03/10/2014

The Result

But, although the undeniable utility, the combustion reactions are responsible for one of the biggest ambient problems of the planet: the atmospheric pollution. The derivatives of the oil, substances called hydro-carbons that are formed by atoms of carbon and hydrogen, are the generators of pollutants. What it is a chemical reaction? A chemical reaction is a transformation of the substance in which changes in the composition occur reacting chemistry of one or more substances, resulting in one or more products. When occurring a chemical reaction always will have an energy variation. what it is energy? The energy is defined as capacity to carry through work or as the result of the accomplishment of a work, if it has energy has heat.

Therefore the heat is an energy form that if transfers of a point to another one whenever it has differences of temperature between them. In general, the result of the heat flows is the increase of temperature of the body that receives heat and the reduction of temperature of the body that yields heat. In function of the involved heat in a chemical reaction we can classify them in: Endothermic: They absorb energy in the heat form (ENDO = for inside)? Exotrmicas: They liberate energy in the form of heat (EXO = for are) In the Combustion or burning occurs a exotrmica chemical reaction between a substance (the fuel) and a gas (the supporter of combustion), generally the oxygen, to liberate heat. In a combustion complete, a fuel reacts with a supporter of combustion, and as resulted if it gets resultant composites of the union of both, beyond energy, being that some of these composites are the main .causing agents of the atmospheric pollution. In the combustion of the hydro-carbons (CO2) occurs to the carbonic gas formation and water, the energy is set free under the heat form.